Phalaenopsis orchid plant named ‘Rubicon’

ABSTRACT

A new and distinct  Phalaenopsis  plant named ‘Rubicon’ particularly characterized by flowers which are white, within the labellum some yellow and some purple; plants which may be propagated economically and uniformly using tissue culture; plants which produce more than one inflorescence; long and sturdy inflorescences; and relatively short, dark-green foliage.

Latin name of the genus and species of the plant claimed: Phalaenopsis hybrid.

Variety denomination: ‘Rubicon’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Phalaenopsis plant, botanically known as Phalaenopsis of the Orchidaceae family, and hereinafter referred to by the cultivar name ‘Rubicon’.

Phalaenopsis comprises a genus of about 55 species of herbaceous perennials many of which, or the hybrids thereof, are suitable for cultivation in the home or greenhouse. Phalaenopsis is predominantly epiphytic or rock-dwelling, and is native to tropical Asia, the Malay Archipelago, and Oceania. The species typically has 2-ranked, fleshy, oblong or elliptic leaves affixed to a short central stem (monopodial growth), which vary in size from 5 to 8 inches to over 2 feet. The leaves may be entirely green or mottled with silver grey.

Phalaenopsis orchids, often referred to as ‘Moth Orchids’ in the horticultural trade, are frequently used to furnish cut flowers for the florist trade or sold as flowering potted-plants for home or interiorscape.

Phalaenopsis produces upright or pendent lateral racemes, often with many showy flowers which open in succession beginning with the lowermost. The flowers possess three sepals and three petals; the lateral ones being alike. The lowermost petal, called the labellum, is three-lobed and is often more brightly-colored than the other flower segments. Flower colors include various shades of pink, white, yellow and red-brown.

Phalaenopsis orchids are typically propagated from seeds. Asexual propagation of Phalaenopsis is often done from off-shoots which frequently arise from the lower bracts of the inflorescence. The resulting plants are detached from the mother plant and may be planted in a suitable substrate.

The new Phalaenopsis ‘Rubicon’ is a product of a controlled breeding program conducted by the inventors, René Schoone, in Strengweg, Heemskerk, The Netherlands. The objective of the breeding program was to develop a new Phalaenopsis cultivar particularly characterized by its attractive and unique colored flowers, economical propagation via tissue culture, rapid growth, and a plant dimension suitable for packaging and shipping to the market.

The new Phalaenopsis ‘Rubicon’ originated from a cross made by the inventor in 1998 in Strengweg, Heemskerk, The Netherlands. The female or seed parent is the Phalaenopsis cultivar designated ‘(Winter Kaala×amabilis)’, unpatented. The male or pollen parent is the Phalaenopsis cultivar designated ‘Spring Song’, unpatented. The new Phalaenopsis ‘Rubicon’ was discovered and selected by the inventor as a single flowering plant within the progeny of the stated cross in a controlled environment in 2006 in Strengweg, Heemskerk, The Netherlands.

Asexual reproduction of the new Phalaenopsis cultivar by tissue culture was first performed in November, 2006 in Cieweg 13, Heemskerk, The Netherlands, and has demonstrated that the combination of characteristics as herein disclosed for the new cultivar are firmly fixed and retained through successive generations of asexual reproduction. The new cultivar asexually reproduces true-to-type.

BRIEF DESCRIPTION OF THE INVENTION

The following traits have been repeatedly observed and are determined to be unique characteristics of ‘Rubicon’, which in combination distinguish this Phalaenopsis as a new and distinct cultivar:

-   -   1. flowers which are white, within the labellum some yellow and         some purple;     -   2. plant produces more than one inflorescence;     -   3. plants may be propagated economically and uniformly using         tissue culture;     -   4. inflorescence is long and sturdy; and     -   5. relatively short, dark-green foliage.

In comparison with the parental cultivars of ‘Rubicon’, the female parent ‘(Winter Kaala×amabilis)’ has white flowers and they are about 9 cm in size, the male parent ‘Spring Song’ has white colored flowers and they are about 12 cm in size, whereas the flowers of ‘Rubicon’ are white and are about 10 cm in size.

Presently, the most commercially similar cultivars to the instant cultivar ‘Rubicon’ are the parent cultivars ‘(Winter Kaala×amabilis)’ and ‘Spring Song’, to which a comparison has been provided above.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photographs illustrate the overall appearance of the new Phalaenopsis ‘Rubicon’ showing the colors as true as is reasonably possible with colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description, which accurately describe the color of ‘Rubicon’.

FIG. 1 shows a side view perspective of a typical flowering plant of ‘Rubicon’ in a 12 cm pot, at 16 months of age.

FIG. 2 shows a close-up view of the typical buds and flowers of ‘Rubicon’.

FIG. 3 shows a close-up view of the typical leaves of ‘Rubicon’.

DETAILED BOTANICAL DESCRIPTION

The new Phalaenopsis cultivar ‘Rubicon’ has not been observed under all possible environmental conditions. The phenotype of the new cultivar may vary with variations in environment such as temperature, light intensity, and day length without any change in the genotype of the plant.

The aforementioned photographs, together with the following observations, measurements and values describe plants of ‘Rubicon’ as grown in a greenhouse in Strengweg, Heemskerk, The Netherlands, under conditions which closely approximate those generally used in commercial practice. Initially, the ideal temperature to grow plants of ‘Rubicon’ is 27° C. during the day and at night. Then, during the flowering phase of ‘Rubicon’, the ideal growing temperature is 20-22° C. during the day and 18° C. at night. Light levels for growing ‘Rubicon’ are a minimum of 5,000 lux and a maximum of 10,000 lux. A balanced fertilizer with level of 200 ppm N, 87 ppm P, 168 ppm K is applied. Duration of growth of ‘Rubicon’ from potting size is between 10 and 14 months.

Color references are made to The Royal Horticultural Society Colour Chart (R.H.S.), 2007 edition, except where general colors of ordinary significance are used. Color values were taken under daylight conditions at approximately noon in Zaandammerweg, Assendelft, The Netherlands. The age of the ‘Rubicon’ plants described is 12 months after potting.

-   Classification:     -   -   Botanical.—Phalaenopsis hybrid. -   Parentage:     -   -   Female or seed parent.—Phalaenopsis cultivar designated             ‘(Winter Kaala×amabilis)’, unpatented.         -   Male or pollen parent.—Phalaenopsis cultivar designated             ‘Spring Song’, unpatented. -   Propagation:     -   -   Type.—Tissue culture.         -   Rooting habit and description.—Fleshy; approximately 6 mm-9             mm wide and greyed/green (RHS 190C and RHS 195A) in color;             freely branching. It takes 12 weeks for plants growing in             tissue culture to initiate roots. -   Plant:     -   -   Size at maturity.—Height (from bottom of pot to highest             flower): about 60 cm. Spread: about 58 cm.         -   Growth habit.—Standard; green leaves (RHS N137B) and a             relatively normal raceme.         -   Vigor.—Moderate.         -   Crop time.—Following asexual propagation, at about 26 weeks             2 leaves appear; at about 30 weeks 3-4 leaves appear; after             a cold treatment of about 4-8 weeks at a temperature of             about 19° C. about 2 racemes with flowers appear. -   Foliage:     -   -   Quantity per plant.—About 6 to 8 leaves are produced before             flowering.         -   Arrangement and attachment.—Half up/horizontal and on two             sides.         -   Overall shape of leaf.—Oval, the tip is blunt and             asymmetric.         -   Texture (upper and under surface).—Smooth and leathery.         -   Pubescence.—None.         -   Mature leaf length.—About 20 to 22 cm.         -   Mature leaf width.—About 8 to 10 cm.         -   Mature leaf thickness.—About 2 mm.         -   Mature leaf color.—Upper surface: green (RHS N137B). Under             surface: yellow/green (RHS 146B).         -   Leaf base.—Acute.         -   Margin.—Entire.         -   Venation.—Pattern: parallel. Color of midvein: upper             surface: green (RHS N137B). Under surface: yellow/green (RHS             146B). -   Raceme:     -   -   Quantity per plant.—About 1 to 2.         -   Number of flowers per raceme.—About 10 to 14.         -   Length.—About 55 to 65 cm.         -   Diameter.—About 5 mm.         -   Strength.—Strong.         -   Aspect.—Upright.         -   Texture.—Glabrous and smooth.         -   Color.—Brown (RHS N200A) with yellow/green spots (RHS 144C).         -   Internode.—Length: about 40 mm. -   Inflorescence description:     -   -   Appearance.—Upright to slightly pendant, racemose             inflorescence with bilaterally symmetrical flowers that open             in succession beginning with the lowermost flower.         -   Buds.—Height (from base to tip): about 18 mm to 28 mm.             Diameter (at midpoint): about 15 mm to 22 mm. Shape:             oval/egg-shaped. Color: yellow/green (RHS 145A and RHS 145B)             with some purple/violet (RHS N81B). Orientation: same             orientation as the flowers (forward facing).         -   Flowering time.—For an untreated plant (flowering plant that             has not undergone cold-treatment where the plant grows at a             temperature of 18° C. to 19° C. for about 4 to 8 weeks after             a period of about 30 weeks at a temperature of 25° C.), 2             racemes appear with about 16 to 20 flower buds and flowers             per inflorescence. First flowers can be expected             approximately 4 to 6 months after planting a plant with a             leaf diameter of 3 to 5 cm. Flowers persistent.         -   Flowering longevity.—On the plant: about 4 to 6 months;             lastingness of cut flowers: has not been observed.         -   Fragrance.—No fragrance.         -   Flower.—Rate of opening: Flowers fully opened about 2 to 3             days after petal and sepal separation. Orientation at             opening: slanted upward and outward. Shape: Typical shape of             Phalaenopsis orchid; see FIG. 2. Size: Height (of a single             bloom): about 85 mm. Diameter (of a single bloom): about             100 mm. Depth of tube: about 18 mm.         -   Petals.—Quantity and arrangement: three petals and three             sepals that are trimerous, overlapping and arranged in 2             whorls. Petals are more pronounced than sepals. Arrangement:             Inner whorl comprises 3 petals: 2 lateral petals and             labellum. 2 lateral petals: Overall shape: broadly ovate and             weakly cupped. Apex: oval. Margin: entire and weakly             undulate. Base: broadly ovate. Length: about 60 mm. Width:             about 50 mm. Texture: Upper surface: smooth and satiny.             Under surface: smooth and satiny. Color (when fully opened):             upper and under surface: white (RHS NN155D).         -   Labellum.—Overall shape: 3-lobed with 2 prominent             callosities at central junction of the lateral lobes and             base of the midlobe. Lateral lobes of labellum fold upward             about the column; the midlobe extends forward and is             terminated by 2 filiform appendages at the apex. Lateral             lobes of the labellum are ovate in shape while the midlobe             is triangular with a bump and a rib on it. Margin: entire             and weakly undulate. Apex: oval. Length: about 25 mm. Width             (not flattened): about 24 mm. Texture: Upper & under             surface: smooth and satiny. Color (when fully opened): Upper             surface: the main color is white (RHS NN155D). At the base             of the lateral lobes some purple stripes (RHS 59B) and at             the bottom edges yellow/green (RHS 1A), yellow (RHS 12A) and             purple (RHS 183D). The mid lobe is white (RHS NN155D) with             at the base yellow (RHS 1A/RHS 12A) and some purple (RHS             183D). Under surface: midlobe: main color is white (RHS             NN155D). At the base yellow (RHS 12A/RHS 1A) and some purple             (RHS 183D). Lateral lobes: main color is white (RHS NN155D).             Bottom edges are yellow/green (RHS 1A/RHS 1B). At the base             also some purple (RHS 59C). Cirrhi: long (about 28 mm).             color: white (RHS NN155D) and yellow (12A). Pestle             (Callosities): Length: about 6 mm. Width (not flattened):             about 7 mm. Color: yellow (RHS 13B) with purple (RHS 59B)             spots.         -   Sepals.—Arrangement: Outer whorl comprises 3 sepals. Overall             shape: Elliptical and weakly cupped. Margin: entire and             weakly undulate. Length: about 50 mm. Width: about 35 mm.             Apex: oval/round; lateral are little more pointy. Texture:             Upper & under surface: smooth and satiny. Color (when fully             opened): Upper surface: white (RHS NN155D). On the lateral             sepals there is a haze of green/yellow (RHS 1D) and             red/purple (RHS 64B). Under surface: white (RHS NN155D) with             yellow/green in the center (RHS 154C and RHS 154B) and             red/purple (RHS 64B).         -   Pedicel.—Length: about 35 mm to 40 mm. Diameter: about 4 mm.             Color: white (RHS NN155B) with a purple haze (RHS N78B)             which runs into yellow/green (RHS 145C) and RHS 146C. -   Reproductive organs:     -   -   Arrangement.—The stamens, style and stigmas are fused into a             single, short structure called the column, possessing one             terminal anther with pollen grains united into a pollinia,             which are covered by an anther cap. The stigma is located             under the column behind the pollinia. The ovary is inferior             with three carpels present. The plant has not produced seed.         -   Column.—Length: about 8 mm. Diameter: about 6 mm. Color:             white (RHS NN155D).         -   Pollinia.—Quantity: Two. Size: about 1 mm. Color: orange             (RHS 26B).         -   Ovary.—Length: about 5 mm. Diameter: about 5 mm. Color:             white (RHS NN155D). -   Disease/pest resistance/susceptibility: No specific resistance or     susceptibility observed. -   Temperature tolerance: Tolerant to a low temperature of about 15° C.     and to a high temperature about 30° C. 

What is claimed is:
 1. A new and distinct Phalaenopsis plant named ‘Rubicon’, as illustrated and described herein. 